Millstone deivee



(No Model.) 3 Sheets-Sheet 1.

L. READ. MILLSTONE DRIVER.

No. 263,724. Patented Sept. 5, 18821 mtnesses Inventor (No Model.) 3Sheets-SheetZ. L. READ.

MILLSTONE DRIVER. No. 263,724. Patented Sept. 5, 1882.

[n ren for h H mlnesses (No Model.) 3 Sheets-Sheet 3.

L..-READ.

MILLSTONE DRIVER.

Patented Sept-5. 1882.

Inc/e17 to)" m Witnesses UN TED STATES PATENT ()FFIGE.

LUTHER READ, or HENDERSON, ASSIGNOR or ONE-HALF TO LOUIS s. ORANDALL, onNEW YORK, N. Y.

MlLLSTONE-DRIVER.

SPECIFICATION forming part of Letters Patent No. 263,724, datedSeptember 5, 1882. Application filed May 5, 1881. (No model.)

To all whom it may concern Be it known that I, LUTHER READ, of thevillage of Henderson, county of Jefferson, and State of New York, haveinvented a new and useful Improvement in Millstone-Drivers, of which thefollowing is a specification.

This invention relates to improvements in hails and drivers formillstones; and the objects of my improvements are to provide mechanicalmeans which will automatically adjust the driver to the bail when motionis communicated to the stone by the spindle, so that the stone shall runtrue at all times.

My invention consists in the novel construction and. combination ofparts, as will be hereinafter more particularly set forth and described.

In the accompanying drawings, forming a part ofthis specification,Figure 1 is a perspective view, showing the bail, cap-plate, doublecrankdriver, and hearings in regular order. Fig. 2 is a perspective view ofmy improved bail. Fig. 3 is a perspective view of the doublecrank driverand cap-plate. Fig. 4 is a longitudinal vertical sectional view, showingthe parts in. connection. Fig. ,5 is a vertical sectional view takenthrough the center of the capplate and cock-head; and Fig.tiisalongitudinal vertical sectional view of a section of thedouble-crank driver and journal-bearings.

In the accompanying drawings, the letter B represents the bail, formedwith its top part, B, curved downward, substantially as shown in thedrawings, and having formed in the cen ter of the top a suitableopening, in which is placed and fitted the cockeye A. In the inner faceof each arm of the bail are formed vertical slots or recesses G G, forthe, purposes hereinafter set forth.

The letter D represents a double-crank driver, (see Figs. 8 and 4,)formed at its ends with journals fitting in the journal bearings E E,which in turn fit in the vertical slots or recesses of the bail-arms.These journal-boxes E are formed so that they are choked in the center,and from thence flare in both directions toward the outsides of the box,the object being to produce a contraction in the central portion of thebearings, substantially as shown in Figs. 4. and 6 of the drawings, thejournal being designated at a a, and the contracted bearings at a a. Bythis formation and connection serted through the spindle,

across the under side to receive the central long arm, Q, of thedouble-crank driver, and is also formed with the cock-head A.

A The letter F represents the spindle, formed with a semicirculartransverse journal-bearin g at the top to receive the long arm Q of thedouble-crank driver, and the upper half of this arm Q fits in a similarjournal-bearing in the cap, which is adjusted on the spindle, as shownat N in Fig. 5 of the drawings.

The letters L L represent the legs or extensions of the bail, which areconnected with the millstone in the usual manner. The letters to w areordinary journal-washers.

If preferred, the journal-bearin g for the long arm Q of thedouble-crank driver may be inas shown by the dotted linesat N in Fig. 5of the drawings.

Operation: The driver is rotated by the action ofthe spindle, and turnsthe bail and stone by reason of its connections in the recesses in theinner sides of the arms of the bail, and by means of thecontractedbearings a longitudi nal adjustment is attained, and throughthe bearin gs in the spindle a cross adjustment, and thus any lurchingtendency of the stone occasioned at starting or occurring while inmotion is promptly arrested or corrected.

It will be observed that by means of the bowed top formed, as described,in the bail the cock-head and cockeye are brought down to a linehorizontally coinciding with the point where the actuating-power isapplied to the bail by the driver, so that the point of suspension andthe point of actuation fall horizontally parallel, as shown by thedotted lines a: m in Fig. 4. This feature of my invention is animportant one, and it differs materially from the usual methods ofmaking connection where the cock-head and cockeye are placed to operatein the 'bail above the point where the driver moves the bail.

By actuating the bail-to turn the stone at a point horizontallycoinciding with the point of suspension a much more steady rotation ofthe stone is produced than where the swaying and IOC lurching distanceis made greater by the increased distance between the point ofsuspension and the axis of the driver. This advantage is obtained by myimproved construction of the bail with the downward-projecting bow.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s-- 1. The combination, with a rotating spindle, aspindle-cap provided with a journal-bearin g, and a millstone-drivercomprising the bearing portion Q, an upward-projecting crank at each endof the bearing portion Q, and journals and journal-bearingboxes, of thebail provided with arms having vertical slots or recesses in theopposite sides thereof, substantially as set forth.

2.The combination of a millstone driver having end horizontal bearingswith the bearing-boxes having contracted centers for journal-bearings,whereby the driver is rendered adjustable to the bail and stone,substantially as described.

3. The combination of the bail B, having the downward bow B, siderecesses, C O, and cockeye A, with the double crank driver D, thejournal-bearing boxes E E, the spindle, and spindle-cap'd, havingcock-head A, substantially as described.

Signed at Henderson Jefferson county, New 0 York, this 18th day ofAugust, 1880.

LUTHER READ.

Witnesses:

CHAS. H. SPRAGUE, FRANK IVEs.

